Scripting error help

[The chaser]

I think it's this way:

////////////////////////////

// Run first time starting map

void OnStart()

{

AddUseItemCallback("", "templekey", "startdoor_nextmap", "UsedKeyOnDoor", true);

}





void UsedKeyOnDoor(string &in asItem, string &in asEntity)

{

SetSwingDoorLocked("startdoor_nextmap", false, true);

PlaySoundAtEntity("", "unlock_door.snt", "startdoor_nextmap", 0, false);

RemoveItem("templekey");

}



////////////////////////////

// Run when entering map

void OnEnter()

{



}



////////////////////////////

// Run when leaving map

void OnLeave()

{



}







The error: FATAL ERROR: Could not load script file 'custom_stories/MLP/maps/start.hps

main(9,1): ERR :'Void is not a data type

main(9,1): ERR :'Void is not a data type

main(10,1): ERR : Not all paths return a value